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Viability decision of linear discrete-time stochastic systems with probability criterion

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控制理论与应用（英文版） 2009年第3期7卷 297-300页

作者： Wansheng TANG jun zheng Jianxiong zhang Institute of Systems Engineering Tianjin University Tianjin 300072 China

In this paper, the optimal viability decision problem of linear discrete-time stochastic systems with probability criterion is investigated. Under the condition of sequence-reachable discrete-time dynamic systems, the existence theorem of optimal viability strategy is given and the solving procedure of the optimal strategy is provided based on dynamic programming. A numerical example shows the effectiveness of the proposed methods.

关键词： Stochastic systems Decision-making Probability criterion Dynamic programming

A room-temperature magnetic semiconductor from a Co-Fe-Nb-B metallic glass

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Science China(Physics,Mechanics & Astronomy) 2023年第4期66卷 94-99页

作者： Yu-zhang Jiao Dmitry VLouzguine-Luzgin Ke-Fu Yao zheng-jun zhang Na Chen Laboratory for Advanced Materials Processing Technology(MOE) State Key Laboratory of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Key Laboratory for Advanced Materials(MOE) Schoolof Materials Science and EngineeringTsinghua UniversityBeijing 100084China Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendai 980-8577Japan Mathematics for Advanced Materials-OIL National Institute of Advanced Industrial Science and Technology(AIST)Sendai 980-8577Japan

Magnetic semiconductors with Curie temperatures higher than room temperature show potential for developing spintronic devices with combined data processing and storage functions for next-generation computing *** this study,we present an n-type Co_(19.8)Fe_(8.6)Nb_(4.3)B_(6.0)O_(61.3) magnetic semiconductor with a high Curie temperature of~559 *** magnetic semiconductor has a room-temperature resistivity of~2.10×10^(4)Ωcm and a saturation magnetization of~76 emu/cm^(3).The n-type Co_(19.8)Fe_(8.6)Nb_(4.3)B_(6.0)O_(61.3)magnetic semiconductor was deposited on p-type silicon to form a heterojunction,exhibiting a rectifying *** results provide the design principles for discovering high Curie temperature magnetic semiconductors with determined conduction types,which would play an essential role in realizing nonvolatile spin-based transistors that break free from the confines of currently established Si-based information technology.

关键词： magnetic semiconductor ferromagnetic metallic glass high Curie temperature

Vestigial suppresses apoptosis and cell migration in a manner dependent on the level of JNK-Caspase signaling in the Drosophila wing disc

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Insect Science 2021年第1期28卷 63-76页

作者： Wen-Min Fan Dan Luo jun-zheng zhang Dan Wang Jie Shen Department of Entomology and MOA Lab for Pest Monitoring and Green Control China Agricultural UniversityBeijingChina

The Decapentaplegic(Dpp)and Wingless(Wg)signal pathways play important roles in numerous biological processes in *** Drosophila vestigial(vg)gene is selectively required for wing imaginal disc cell proliferation,which is essential for the formation of the adult wing and halter structures,and is regulated by Dpp and Wg *** a Drosophila invasion model of wing epithelium,we showed herein that inhibition of Dpp or Wg signaling promoted cells to migrate across the cell lineage restrictive anterior/posterior(A/P)compartment *** downstream of both Dpp and Wg signaling,vg can block cell migration induced by loss of either *** addition,suppression of vg is sufficient to induce cell migration across the A/P *** analysis revealed potential downstream genes involved in the cell migration after suppressing vg in the wing *** further demonstrated that the c-jun N-terminal kinase(JNK)signaling promoted cell migration induced by vg suppression by upregulating Caspase *** together,our results revealed the requirement ofVg for suppressing cell migration and clarified how developmental signals collaborate to stabilize cells along the compartment boundary.

关键词： Caspase cell migration Dpp Drosophila wing disc JNK vestigial Wg

Synthesis temperature dependence of morphologies and properties of cobalt oxide and silicon nanocrystals

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Frontiers of Computer Science 2011年第3期5卷 311-321页

作者： Akimasa KOJI Javed IQBAL Rong-Hai YU zheng-jun zhang Department of Materials Science and Engineering Tsinghua University Beijing 100084 China Department of Metallurgy and Ceramics Science Tokyo Institute of Technology 2-12-10okayama Meguro-ku Tokyo 152-8552 Japan

Cobalt and cobalt oxide nanocrystals were synthesized on Si substrates from aqueous cobalt nitrate [Co（NO3）2·6H2O] powder via chemical vapor deposition method. Scanning electron microscope, field emission scanning electron microscope, and transmission electron microscope observations show different morphologies, such as continuous films, nano-bars, nano-dices, and nano-strings, depending on the synthesis temperature. The crystal structure characterization was conducted using X- ray diffraction methods. Furthermore, the properties of the samples were characterized using Raman spectroscopic analysis and vibrating sample magnetometer. The morphology change was discussed in terms of synthesis environments and chemical interactions between cobalt, oxygen, and silicon.

关键词： cobalt oxide nanostructure temperature dependence magnetic property

Myogenic differentiation of mesenchymal stem cells for muscle regeneration in urinary tract

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Chinese Medical Journal 2013年第15期126卷 2952-2959页

作者： YANG Bin zheng jun-hua zhang Yuan-yuan Tongji Univ Sch Med Dept Urol Shanghai Peoples Hosp 10 Shanghai 200072 Peoples R China Wake Forest Univ Sch Med Wake Forest Inst Regenerat Med Winston Salem NC 27101 USA

Objective This article was to review the current status of adult mesenchymal stem cells transplantation for muscle regeneration in urinary tract and propose the future prospect in this field. Data sources The data used in this review were mainly obtained from articles listed in Medline and PubMed （2000- 2013）. The search terms were ＂mesenchymal stem cells＂, ＂bladder＂, ＂stress urinary incontinence＂ and ＂tissue engineering＂. Study selection Articles regarding the adult mesenchymal stem cells for tissue engineering of bladder and stress urinary incontinence were selected and reviewed. Results Adult mesenchymal stem cells had been identified and well characterized in human bone marrow, adipose tissue, skeletal muscle and urine, and demonstrated the capability of differentiating into smooth muscle cells and skeletal muscle ceils under myogenic differentiation conditions in vitro. Multiple preclinicat and clinical studies indicated that adult mesenchymal stem cells could restore and maintain the structure and function of urinary muscle tissues after transplanted, and potentially improve the quality of life in patients. Conclusions Smooth or skeletal myogenic differentiation of mesenchymal stem cells with regenerative medicine technology may provide a novel approach for muscle regeneration and tissue repair in urinary tract. The long-term effect and safety of mesenchymal stem cell transplantation should be further evaluated before this approach becomes widely used in patients.

关键词： mesenchymal stem cell tissue engineering regenerative medicine bladder stress urinary incontinence

基于拉曼光谱技术的枇杷果实β-胡萝卜素含量无损测定研究

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光谱学与光谱分析 2016年第11期36卷 3572-3577页

作者：王涛裘正军张卫正赵艳茹何勇浙江大学生物系统工程与食品科学学院浙江杭州310058

β-胡萝卜素作为一种重要的营养元素,其在果蔬活体内的测定方法通常必须对样品进行破坏,并且耗时、费力。采用拉曼光谱技术预测活体枇杷果实内β-胡萝卜素含量,以高效液相色谱法(HPLC)检测值作为参考值,采用高斯平滑对光谱数据进行预处... 详细信息

β-胡萝卜素作为一种重要的营养元素,其在果蔬活体内的测定方法通常必须对样品进行破坏,并且耗时、费力。采用拉曼光谱技术预测活体枇杷果实内β-胡萝卜素含量,以高效液相色谱法(HPLC)检测值作为参考值,采用高斯平滑对光谱数据进行预处理,同时使用多项式拟合(PF)的方法对光谱数据进行背景荧光扣除,以标准β-胡萝卜素的拉曼图谱为基础,选取了三个特征频移,以特征频移和截取的光谱建立了MLR模型、PLSR模型以及LS-SVM模型,取得了比较好的预测精度。其中LS-SVM模型的预测精度最高,其预测相关系数R_p^2达到了0.91,表明通过拉曼光谱对活体枇杷内β-胡萝卜素的含量检测是实际可行的。

关键词： β-胡萝卜素枇杷拉曼光谱 HPLC

Long-term oncologic outcomes of laparoscopic versus open partial nephrectomy

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Chinese Medical Journal 2013年第15期126卷 2938-2942页

作者： zheng jun-hua zhang Xiao-long GENG Jiang GUO Chang-cheng zhang Xiao-peng CHE Jian-ping YAN Yang PENG Bo WANG Guang-chun XIA sheng-qiang WU Yan Tongji Univ Dept Urol Shanghai Peoples Hosp 10 Shanghai 200072 Peoples R China Nanjing Med Univ Dept Urol Clin Med Coll 1 Nanjing 210002 Jiangsu Peoples R China

Background Most of the literatures on laparoscopic partial nephrectomy （LPN） versus open partial nephrectomy （OPN） focus on technical details and early or mid-term oncologic outcomes, reflecting that the approach is safe and provides mid- term benefits compared with traditional open surgery. However, the difference of long-term oncologic outcome between LPN and OPN remains unclear. The aim of this meta-analysis was to evaluate the long-term oncologic outcome of LPN in the treatment of localized renal tumors compared with that of OPN. Methods A systematic search of electronic databases including Medline, Embase, and Cochrane library was conducted. Comparative studies reporting on long-term oncologic outcome of LPN versus OPN were regarded eligible. The odds ratio （OR） and its corresponding 95% confidence intervals （CO were calculated for the oncologic outcomes. The methodologic quality of the included studies was evaluated using the strict criteria of the Newcastle-Ottawa scale. Results Six comparative studies （1495 participants including 555 LPN and 940 OPN） were included in the present study. There was no significant difference between LPN and OPN in 5-year overall survival （OS） rates （OR=1.83, 95% Cl （0.80, 4.19））, 5-year cancer specific survival （CSS） rates （OR=1.09, 95% CI （0.62, 1.92））, and 5-year recurrence free survival （RFS） rates （OR=0.68, 95% CI （0.37, 1.26））. Conclusion The results of this meta-analysis revealed that there was no significant difference in long-term oncologic outcome between LPN and OPN for treatment of localized renal tumors.

关键词： laparoscopic partial nephrectomy meta-analysis outcome open partial nephrectomy renal tumor

Widely tunable optical properties via oxygen manipulation in an amorphous alloy

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Science China Materials 2021年第9期64卷 2305-2312页

作者： Ying-qi zhang Li-ying Zhou Sheng-ye Tao Yu-zhang Jiao Jin-feng Li Kai-ming zheng Yuan-chao Hu Kai-xuan Fang Cheng Song Xiao-yan Zhong Limei Xu Ke-Fu Yao zheng-jun zhang Na Chen Key Laboratory for Advanced Materials Processing Technology(MOE) The State Key Laboratory of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084China International Center for Quantum Materials Peking UniversityBeijing 100084China Collaborative Innovation Center of Quantum Matter Beijing 100871China Institute of Materials China Academy of Engineering PhysicsMianyang 621907China Institute of Industrial Science University of Tokyo4-6-1 KomabaMeguro-kuTokyo 1538505Japan Key Laboratory for Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China National Center for Electron Microscopy in Beijing Key Laboratory of Advanced Materials(MOE)The State Key Laboratory of New Ceramics and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Department of Materials Science and Engineering City University of Hong KongTat Chee AvenueKowloonHong KongChina

The ability to widely tune the optical properties of amorphous alloys is highly desirable especially for their potential applications in optoelectronic *** this work,we demonstrate that introducing oxygen into an amorphous alloy system of Co-Fe-Ta-B enables the formation of various amorphous derivatives ranging from metals to semiconductors,and eventually to *** oxygencontaining amorphous derivatives gradually become transparent with the opened bandgaps,leading to a continuous increase in their optical ***,the reflective metal-type amorphous alloy and transparent insulator-type amorphous oxide of the system can be integrated together to realize the full-color tuning over the entire visible spectral *** provides a new way to develop large-area color coatings with high design flexibility and full-color *** envisage that the design concept proposed in this work is also applicable to many other amorphous alloy systems,from which all types of amorphous materials including alloys,semiconductors and insulators may be developed to show unprecedented optical functionalities.

关键词： amorphous alloy oxygen manipulation amorphous oxide optical properties

Joint Probabilistic Scheduling and Resource Allocation for Wireless Networked Control Systems

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 258-260页

作者： Meng zheng Lei zhang Wei Liang IEEE the State Key Laboratory of Robotics and the Key Laboratory of Networked Control Systems Shenyang Institute of Automation Chinese Academy of Sciences the University of Chinese Academy of Sciences

Dear Editor,This letter presents a joint probabilistic scheduling and resource allocation method(PSRA) for 5G-based wireless networked control systems(WNCSs). As a control-aware optimization method, PSRA minimizes the linear quadratic Gaussian(LQG) control cost of WNCSs by optimizing the activation probability of subsystems, the number of uplink repetitions, and the durations of uplink and downlink phases. Simulation results show that PSRA achieves smaller LQG control costs than existing works.

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